Display screen or portion thereof with graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface according to one embodiment; and,

FIG. 2 is a front view of a display screen or portion thereof with a graphical user interface according to another embodiment.

The broken line showing of the display screen or portion thereof and the remainder of the graphical user interface illustrates environmental elements and forms no part of the claimed design. 

CLAIM We claim the ornamental design for a display screen or portion thereof with graphical user interface, as shown and described. 